Euclid's Elements of Geometry |
From inside the book
Page 161
Ratio is a mutual relation of two magnitudes of the same kind , in respect of quantity . 4. Magnitudes are said to have a ratio to one another , when the less can be multiplied so as to exceed the greater . 5. Magnitudes are said to be ...
Ratio is a mutual relation of two magnitudes of the same kind , in respect of quantity . 4. Magnitudes are said to have a ratio to one another , when the less can be multiplied so as to exceed the greater . 5. Magnitudes are said to be ...
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Common terms and phrases
absurd added appears arch assumed base becomes bisected called centre changing circle circumference co-efficient common Const construct contained oftener described difference divided double draw drawn equal angles equal by Prop equation equi-multiples equi-submultiples equiangular equilateral evident example extremes fall figure fore four magnitudes fourth fraction given given circle given line given right line greater half Hypoth inscribed internal less mean meeting multiple oftener contained opposite parallel parallelogram pass perpendicular possible PROBLEM produced proportional PROPOSITION quantities radius ratio rectangle rectilineal figure right angles right line root segment side AC sides similar similarly demonstrated square stand submultiple Subtraction taken term THEOREM third touches triangle ABC twice whole
Popular passages
Page 16 - If two triangles have two sides of the one equal to two sides of the...
Page 26 - DE : but equal triangles on the same base and on the same side of it, are between the same parallels ; (i.
Page 205 - ... they have an angle of one equal to an angle of the other and the including sides are proportional; (c) their sides are respectively proportional.
Page 214 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Page 125 - In any proportion, the product of the means is equal to the product of the extremes.
Page 159 - Magnitudes are said to be in the same ratio, the first to the second and the third to the fourth, when, if any equimultiples whatever be taken of the first and third, and any equimultiples whatever of the second and fourth, the former equimultiples alike exceed, are alike equal to, or alike fall short of, the latter equimultiples respectively taken in corresponding order.
Page 110 - To reduce fractions of different denominators to equivalent fractions having a common denominator. RULE.! Multiply each numerator into all the denominators except its own for a new numerator, and all the denominators together for a common denominator.
Page 211 - ... are to one another in the duplicate ratio of their homologous sides.
Page 161 - Convertendo ; when it is .concluded, that if there be four magnitudes proportional, the first is to the sum or difference of the first and second, as the third is to the sum or difference of the third and fourth.
Page 86 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Bibliographic information
| Title | Euclid's Elements of Geometry |
| Author | Euclid |
| Editor | T. W. Herbert |
| Publisher | Bell & Daldy, 1872 |
| Original from | the University of Michigan |
| Digitized | 8 Jun 2007 |
| Length | 261 pages |
| Export Citation | BiBTeX EndNote RefMan |